US678951A - Electric-arc lamp. - Google Patents

Description

M gli 8 7 nu 0. N

(No Model.)

Amgbm;

ma cams vzzns ca, wom-umm WASHINGTON, D. c.,

y UNITED STATES PATENT OFFICE.

JOHN A. IIEANY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE TETER-HEANY DEVELOPING COMPANY, OF SAME PLACE AND CHARLES TON, WEST VIRGINIA.

ELECTRIC-ARC LAM P.

SPECFICATION forming part of Letters Patent No. 678,951, dated July 23, 1901. Application iilcd December 13, 1900. Serial No. 39,619. (No model.)

To @ZZ whom, t may concern:

Beit known that I, JOHN A. HEANY, a citi` zen of the United States, residing at the city of Philadelphia, in thecounty of Philadelphia and State of Pennsylvania,have invented certain new and usefullmprovements in Electric-Arc Lamps, of which. the following is a specification.

My invention has relation to an electricarc lamp, and in such connection it relates to the construction and arrangement of parts constituting such a lamp.

The principal objects of myinvention are, first, to provide in an arc-lamp a substantially air-tight receptacle wherein the carbons are adapted to be consumed and a feeding mechanism forv the upper carbon located within the receptacle and consisting of a leverpivoted at one end, a clutch-arm pivotedV to the lever intermediate of its ends, a magnet-core projecting into the receptacle, and an armature for said core formed on the free end of the lever; second, to provide in an arclamp an upper and lower carbon and feeding mechanism for the upper carbon, all located within a substantially air-tight receptacle, a magnet located without the receptacle, and a core for said magnet projecting into the receptacle and adapted to f control the feeding mechanism for the Lipper carbon; third, to provide in an arc-lamp a tube wherein the upper carbon is adapted to slide and located in the main circuit, a clip comprising two semitubular wings pivotally connected to clamp the upper end of the upper carbon, said clip adapted to slide in the tube, and aspring connecting the clip with the tube, and, fourth, to provide in an arc-lamp a removable ree sistance piece or pieces whereby the use ot' a resistance-coil is obviated.

The nature and scope of my invention will be more fully understood from the following description, taken in connection with the accompanying drawings,forming part hereof, in which- Figure l is a vertical sectional view of an arc-lamp embodying main features of my invention. Fig. 2 is an underneath plan View ofthe feeding mechanism for the upper carbon. Fig. 3 Ais a front elevational view, enlarged and partly broken away, of the resistance removed from the lamp; and Figs. 4 and 5 are enlarged detail views of the clip or holder for the yupper carbon.

Referring to the drawings, ct represents the upper and I) the lower carbon. The abuttingends of these carbons are inclosed in a globe d, having a plate or root` CZ iitted to the upper end of the globe cl to form an air-tight receptacle. From the roof or plate d projects upward a tube c, the upper end of which is provided with a cap c. Y In the tube e the upper carbon a is adapted to slide. The lower carbon b is supported within the globe d by means of a holder b', suspended from and also insulated from the roof-plate d. The upper carbon a is suspended from a clip or holder f, consisting of two semitubular wings f', pivotally connected, as atf?, to inclose the carbon. The clip or holder f is supportedI by a coiled spring gdepending from the cap e' and in electrical connection therewith. The feeding mechanism for the upper carbon o; comprises a lever-arm h, pivoted, as at h', to the under face of the roof-plate d and limited in its downward movement away from the plate d by means of the set-screw 71,2, working in the slot or recess hsin the arm h. The free end of the lever-arm h carries a`n armature h4, formed, preferably, of a ring of soft iron. Projecting through the roof-plate d', adjacent to the ring-armature h4, is a core m, of preferably conical shape. is magnetized when a magnet m', located outside the globe d and on the roof d@ is energized. Intermediate of the pivoted and armature ends of the leverh is pivoted or hinged a magnetic clutch n, vcomprising a clampingface n', adapted to bite into the carbon a, anda tailpiece n2,adapted to be attracted toward the armature h4 when said armature is attracted by the core m of the magnet m. If now the magnet m be energized, its core m will first vmagnetize and then attract the armature h4. The magnetization of the armature h4 will cause the tailpiece n2 to be attracted, thereby causing the clamp n to bite into the carbon a to fasten said carbon to the lever h. The subsequent upward movement of the lever h toward the core m will then serve to lift the This core m IOO carbon a away from the carbon h until the arc between said carbons is disrupted.

The circuit through the lamp is as follows: To a clamping or binding post p one end of the main line is secured. The current then passes by wire p into the magnet m', Afrom which it emerges by wire p2 in electric engagement with the roof-plate CZ. This plate d is in electrical contact with the tube e and 'cap e', and hence the current passes from wire p2 to the plate d and tube c to the cap e'. The current then proceeds by the spring g from the cap c' to the clip or holderf and to the upper carbon a. It then passes to the lower -carbon ZJ and its holder h to a wire p3 and thence through a removable resistance-piece r to a wire p4 and thence by the bindingscrew p5 to the return-wire of the main circuit. The removable resistance r constitutes one of the main features of my invention. It comprises a tube r', of glass, porcelain, or similar non-conducting material, sealed at both ends and having the air exhausted from its interior. A strip of carbon r2 or similar resistance material traverses the interior of the tube r and has its ends projecting through the sealed ends of said tube r and in electric connection with metallic cap-pieces r3, secured to the sealed ends ot the tube. On the roof-plate CZ is located a socket-piece r4 in electric connection with the wire p3, but insulated from the roof-plate CZC In this socketpiece r4 the lower capped end of the resistance r is adapted to be inserted. In an extension or bracket 715 of the tube c is also adjustably supported a socket-piece r,insulated from the extension or bracket 15, butin electric contact with the wire p4. A spring ri serves normally to depress the socket-piece r6 toward the socket r4; but the socket r may be elevated against the tension of the spring r? to permit the upper capped end or resistance i to be slipped into or out of the socket r, Of course the resistance r may be of any value desired, and as it can be easily removed and replaced in the circuit by other pieces of more or less value the strength of the current passing through the lamp may be readily controlled and all danger of burning out can be avoided.

The simple construction and cheap character of the resistance r, together with the fact that it may be removed and replaced, serve to make the lamp much cheaper and better than a lamp wherein many pounds of coiled wire are used as a resistance.

Having thus described the nature and objects oi my invention, what I claim as new, and desire to secure by Letters Patent, is-

I. In an electric-arc lamp, a substantially air-tight receptacle wherein the carbons are adapted to be consumed, and a feeding mechanism for the upper carbon located wholly within the receptacle and comprising a lever pivoted at one end, a magnetic clutch-arm pivoted to the lever intermediate of its ends and adapted to bind or release the upper carbon to or from the lever, a magnet-core projecting into the receptacle and an armature for said core formed on the free end of said lever, substantially as and for the purposes described.

2. In an electric-arc lamp, a tube wherein the upper carbon is adapted to slide and included in the main circuit, a clip comprising two semitubular wings pivoted together to receive and hold the upper carbon, said clip adapted to slide in said tube, and a spring adapted to support said clip and connecting said clip to said tube, substantially as and for the purposes described.

3. In an electric-arc lamp, a tube wherein one ot the carbons is adapted to slide and included in the main circuit, a clip, comprising two semitubular wings pivoted together to receive and hold the carbon, said clip adapted to slide in said tube, and means for connecting` said clip electrically with said tube and for supporting said clip, while so connected, in said tube, substantially as and for the purposes described.

et. In an electric-arc lamp, an upper and a lower carbon,-means for feeding one of said carbons toward the other, a main circuit, wherein the two carbons are included, a binding-post to which one wire of the main circuit is secured, a socket-piece located adjacent to said post and in electrical connection therewith, a second socket-piece located adjacent to and in electric connection with one of the carbons, and a resistance-piece removably secured in said socket-pieces and bridging the same, substantially as and for the purposes described.

5. In an electric-arc lamp, an upper carbon and a lower carbon, means for adjusting said carbons with relation to each other, said means, comprising a feeding mechanism for one ot' said carbons, an inclosed resistance included in and bodily removable from the main circuit in which said carbons are included, the same consisting of a sealed tube ol nonconducting lnaterial having a vacuum in its interior, a strip of carbon or similar resistance material traversing said tube, and metallic caps secured to either sealed end of said tube and in electric connection with said resistance, said resistance interposed in the main circuit between the fixed and movable car bons, substantially as and Afor the purposes described.

In testimony whereof I have hereunto set my signature in the presence of two subscribing witnesses.

J OIIN A. IIEANY.

Witnesses J. WALTER DoUcLAss, Tuoi/Ins M. SMITH.

IIO

Images